American Express harnessed blockchain to create Amex Passport

Physical passport stamps are becoming less common, but an American Express survey found that 73% of adults want more ways to digitally commemorate their trips abroad. A manager at American Express had an idea: turning card transactions into virtual collectible stamps, accessible through the Amex mobile app. Teams spanning American Express’s Digital Labs, tech, travel, and other departments created what’s now called Amex Passport, harnessing blockchain technology to generate and track the stamps,...